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In page Lake Baikal:
"Environmentalists have previously acknowledged pollution at Lake Baikal.[1][2][3] It faces a series of detrimental phenomena including the disappearance of the omul fish, the rapid growth of putrid algae and the death of endemic species of sponges across its area.[3] Environmental advocacy for the lake began in the late 1950s.[4] Since 2010, more than 15,000 metric tons of toxic waste have flowed into the lake.[citation needed]
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